docs/specs/MESA_framebuffer_flip_y.txt

   1 Name
   2
   3     MESA_framebuffer_flip_y
   4
   5 Name Strings
   6
   7     GL_MESA_framebuffer_flip_y
   8
   9 Contact
  10
  11     Fritz Koenig <frkoenig@google.com>
  12
  13 Contributors
  14
  15     Fritz Koenig, Google
  16     Kristian Høgsberg, Google
  17     Chad Versace, Google
  18
  19 Status
  20
  21     Proposal
  22
  23 Version
  24
  25     Version 1, June 7, 2018
  26
  27 Number
  28
  29     302
  30
  31 Dependencies
  32
  33     OpenGL ES 3.1 is required, for FramebufferParameteri.
  34
  35 Overview
  36
  37     This extension defines a new framebuffer parameter,
  38     GL_FRAMEBUFFER_FLIP_Y_MESA, that changes the behavior of the reads and
  39     writes to the framebuffer attachment points. When GL_FRAMEBUFFER_FLIP_Y_MESA
  40     is GL_TRUE, render commands and pixel transfer operations access the
  41     backing store of each attachment point with an y-inverted coordinate
  42     system. This y-inversion is relative to the coordinate system set when
  43     GL_FRAMEBUFFER_FLIP_Y_MESA is GL_FALSE.
  44
  45     Access through TexSubImage2D and similar calls will notice the effect of
  46     the flip when they are not attached to framebuffer objects because
  47     GL_FRAMEBUFFER_FLIP_Y_MESA is associated with the framebuffer object and
  48     not the attachment points.
  49
  50 IP Status
  51
  52     None
  53
  54 Issues
  55
  56     None
  57
  58 New Procedures and Functions
  59
  60     None
  61
  62 New Types
  63
  64     None
  65
  66 New Tokens
  67
  68     Accepted by the <pname> argument of FramebufferParameteri and
  69     GetFramebufferParameteriv:
  70
  71         GL_FRAMEBUFFER_FLIP_Y_MESA                      0x8BBB
  72
  73 Errors
  74
  75     An INVALID_OPERATION error is generated by GetFramebufferParameteriv if the
  76     default framebuffer is bound to <target> and <pname> is FRAMEBUFFER_FLIP_Y_MESA.
  77
  78 Revision History
  79
  80     Version 1, June, 2018
  81         Initial draft (Fritz Koenig)